Ammo Mike's is the smallest, and TylerR was inspired by it to produce three bigger sizes, along with the many enhancements for them including the clutch feature.
So now, the original in the downloads is TylerR's original. The Mongo came next inspired by TylerR's new big Creality machine with it's 350mm square bed.
The original (TylerR's) was barely able to be printed on the normal Creality Enders. The 300mm size was created for us who print on 300x300mm beds, like my CR-10 v2. Affectionately called the "just right" by some like me, since I can't print the Mongo on my printer.
The parts are listed by size in the downloads. If there are no "size" descriptions like, "Mongo" or "300" then they go with TylerR's original size not AmmoMike's smaller original.
One thing TylerR did for the lazy to learn, like me
, was to generate plates for just about everything on every size. But the plate generator is still included for those who need or want to vary from the ones already created. AmmoMike's smaller plates can still be generated using that generator, originally created by AmmoMike, but the ones already generated on TylerR's downloads are for his 3 models.
I must add, that TylerR has added many options to the generator that AmmoMike did not provide.....obviously needed for the bigger collators, plus the wonderful clutch feature. That said, TylerR would be the first to say that we all owe a lot to AmmoMike for his efforts and vision.